[
https://issues.apache.org/jira/browse/HBASE-23369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988561#comment-16988561
]
Duo Zhang commented on HBASE-23369:
-----------------------------------
There could be race...
1. RS generates the region report
2. RS opens/closes a region
3. RS sends the region report to master
Then you will see mismatch between the reported region and region states on
master...
> Auto-close 'unknown' Regions reported as OPEN on RegionServers
> --------------------------------------------------------------
>
> Key: HBASE-23369
> URL: https://issues.apache.org/jira/browse/HBASE-23369
> Project: HBase
> Issue Type: Bug
> Reporter: Michael Stack
> Priority: Major
>
> In old days, if a RegionServer reported a variance that didn't agree w/
> Master view of the cluster, we'd kill the RegionServer.
> Lately, in tests that overrun a cluster, after a sustained high-load, Master
> can start failing its updates against Meta (CallQueueTooBigException <= More
> on this later). It then can lose proper accounting of all Region members. One
> variant has a RegionServer reporting its list of open Regions to the Master
> and the Master doesn't 'know' of a particular Region or the Master may know
> the Region but expects it open on another RegionServer.
> Here is an example of how it looks each time RS reports:
> {code}
> 2019-12-03 07:07:00,757 WARN
> org.apache.hadoop.hbase.master.assignment.AssignmentManager: No
> t1,08f5c285,1573094375485.ee78a0c951c1c902d8f3f3912394a0e5. RegionStateNode
> but reported ONLINE at server.example.org,16020,1575354666245
> (inServerRegionList=false).
> 2019-12-03 07:07:03,793 WARN
> org.apache.hadoop.hbase.master.assignment.AssignmentManager: No
> t1,08f5c285,1573094375485.ee78a0c951c1c902d8f3f3912394a0e5. RegionStateNode
> but reported ONLINE at server.example.org,16020,1575354666245
> (inServerRegionList=false).
> {code}
> Will also show as an 'inconsistency' in the 'HBCK' tab on the Master UI.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
